As an object is passing through a static scattering medium, a speckle is formed. We can reconstruct the image from the speckle, based on the principle of optical memory effect. However, when the object passes through a dynamic scattering medium, such as fog, the reconstructed image quality will be degraded even blurred. In this paper, we want to investigate the reconstructed image as the object passes through the dynamic scattering medium, which is simulated by a rotating ground glass. We focus on studying the influence of both the acquisition time of the CCD and the angular velocity of the rotating ground glass on the fidelity of the reconstructed image. The experimental results show that appropriately reducing the acquisition time of the CCD is beneficial to reconstruct image from the single speckle in the dynamic scattering imaging. The proposed results may have applications in imaging through fog and biological tissues.